Edwin h



(No Model.)

B. H. WHITNEY.

REVERSING GEAR FOR ENGINES.

No. 366,905. Patented July 19, 1887.

INVENTOR- @QM; M2%

WTNESSES 0 N. PETERS. Pmm-Lnho u mr, Washingtfln, D4 (Iv UNITED STATES PATENT OFFICE.

ED\VIN H. XVI-IITNEY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE AMERICAN SHIP \VINDLASS COMPANY, OF SAME PLACE.

REVERSING-GEAR FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 366,905, dated July 19, 1867.

Application filed March 29, 18:7. Serial No. 231,951. (No model.)

['0 all whom, it 72mg concern:

Be it known that I, EDWIN H. WHITNEY, of Providence, in the county of Providence and State of Rhode Island, have invented a new and Improved Reversing-Gear for Steam-Engines, of which the following is a full, clear, and exact description.

- Reference is to be had to the accompanying drawings, formingapart of this specification,in

IO which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the reversible eccentric provided with a hand-wheel for operating the same, and showing also a portion of the engineshaft and its bearing or pil low block. Fig. 2 is a front elevation of the same, showing the engine-shaft in cross-section. Fig. 3 shows the opposite side view from that shown in Fig. 1, the hand-wheel and its hub being shown in sectional elevation. Fig. 4 is a front elevation, the same as Fig. 2, showing the shaft .in section, andshowing the hand-wheel turned to the left, in position to act upon the eccentric for reversing the same and lig. 5 is a similar view to Figs. 2 and 4,

- showing the hand-wheel and the eccentric as having reached their extreme reversed position.

The invention will first be described in con- 0 nection with the drawings, and then pointed out in the claims.

A represents the shaft of the engine journaled in the hearing or pillow block 13, and provided with the loose eccentric E, which 5 operates the main valve of the engine. The eccentric E is formed or provided with the elongated hub h, on which is placed loosely the hand-wheel R, which has formed in the hub R thereof the two opposite cam recesses or 0 grooves, s s. A pin, P, is screwed into the shaft A adjacent to the hub h of the eccentric E, (shown clearly in Fig. 3,) and the hub h is cut away to form the opposite shoulders (I d, which are adapted to strike the pin P to limit 4 5 the movement of the eccentric upon the shaft A in both directions. Screwed into the hub 71. of the eccentricEis the pin 0, (shown clearly in Fig. 1,) with which the shoulders i z" of the hub R of the hand-wheel R are adapted to engage to limit the independent movement of the hand-wheel upon thehubhofthe eccentric, and secured to the hub h of the eccentric E are the two springs g 9, formed with catches a a, and provided at the cateheswi'th thelateral1y-pro jccting pins 0 0, which reach into the above- 5 mentioned cam-grooves s 8, made in the hub It of the hand-wheel.

H represents the relative position of a crankpin to thepoint marked k, which indicates the center of the eccentric E, which shows the proper application of the eccentric to the shaft.

The parts being in the position shown in Fig. 2, and the shaft A revolving in the direction indicated by the arrow placed thereon in said figure, the pin P strikes the shoulder d, and thus revolves the eccentric with the shaft. At this time the catch a of the spring 9 engages the pin P, so that the hand-wheel can not be turned backward, and at this time also the catch a of the spring 9 will have been carried outward by the cam .9 out of range of the pin P, and the shoulder 15 of the handwheel will engage the pin 0, as shown in Fig.

1. Now, to reverse the engine the hand-wheel has simply to be turned in the direction of the arrow in Fig. at. At the outset the hand-wheel will turn independently upon the hub h of the eccentric until the shoulder 2' strikes the pin 0. This independent movement causes cam 8 8o tolift the spring-catch a out of engagement with the pin P, and cam s to bring the catch a into range with the said pin P, as shown in Fig. 4. The further turning of the hand-wheel will turn the eccentric with it, in consequence of the shoulder t striking the pin 0, and this will continue until the shoulder d of the eccentric strikes the pin P, at which time the eccentric will be reversed and the shaft A- caused to revolve in the opposite direction,as indicated by the arrow placed thereon in Fig.

5, and the spring-catch a will now engage the pin P, as shown in Fig. 5.

The inner faces of the spring catches a a are beveled, as shown, to cause them to ride over the pin P, and small clearances ff are formed at the inner ends of the cam-recesses s s, respectively, to permit the catches to have the necessary slight radial movement to permit them to pass the said pin.

Having thus fully described niy invention, 1 claim as new and desire to secure by Letters Patent 1. The eccentric formed with the hub h, formed with shoulders d d to engage a stoppin on the shaft A, in combination with an operating-wheel, It, placed upon the hub of the eccentric and having a limited independent rotary motion thereon, substantially as described.

2. The eccentric E, having a limited independent motion upon the shaft A, in combination with the hand-wheel R, connected to the eccentric and having a slight rotary mo-' tion independent of the eccentric, substantially as described.

3. The eccentric E, having a limited independent motion upon the shaft A,and ahandwheel, R, having a rotary motion independent of the eccentric, combined with spring 20 catches a a, arranged to lock the hand-wheel to the shaft, substantially as described.

4. The eccentric E, formed with the hub h and shoulders d d, the shaft A, provided with a stoppin, P, and the wheel R, placed upon the hub of the eccentric and formed with the shoulders i i and earns s s, in combination with the spring-catches a a and thepin c, all arranged to operate substantially as described.

EDWIN I-I. \VHITNEY.

\Vitnesses:

GEORGE L. GRAHAM,- GEORGE ME'roALF. 

